Pipe-bending machine.



No. 828,338. PATENTED A11 14, 1906.

e. H. REYNOLDS. PIPE BENDING- MACHINE. APPLICATION FILED OUT P ATENTEDAUG. 14, 1906.

G. H. REYNOLDS. B BENDING MACHINE.

PIP

APPLICATION FILED 00114. 1905.

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QM T Qmm u'funmlmlm N0- 828,338. PATENTED AUG. 14, 1906. G. H. REYNOLDS.

PIPE BENDING MAUHINE.

APPLIOATION FILED 001214. 1905.

3 SHEETS-SHEET 3.

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UNITED STATES PATENT OFFICE.

GEORGE H. REYNOLDS, OF MANSFIELD DEPOT, CONNECTICUT, ASSIGNOR TO THEPIPE BENDING MACHINE COMPANY, A CORPORATION OF NORTH CAROLINA.

PIPE-SENDING MACHINE.

To aZZ whom it may concern:

Be it known that I, GEORGE H. REYNOLDS, of Mansfield Depot, county ofTolland, and State of Connecticut, have'invented an Improvement inPipe-Bending Machines, of which the following is a specification.

My invention has reference to pipe-bend ing machines; and it consists ofcertain improvements which are fully set forth in the followingspecification and shown in the accompany'ing drawings, which form a partthereof.

The object of my invention is to provide a simple, eflicient, anddurable machine for bending pipes 'of various sizes and preferably tocurves of different radii.

My invention consists of a frame having secured thereon a semiconehaving its curved face provided with a series of grooves, combined witha cone inversely arranged and having its circumference ,correspondin 1ygrooved and hung to swing concentrica 1y about the semicone, so as to-becapable of bending a tube around its curved portion means to rotate orrock the cone about the semicone, and a support or guide for the pipe, I

whereby it is properly guided between the cone and semicone and heldduring the,bend-.

ing operation.

My invention also comprehends details of construction, which, togetherwith the fea-- tures above specified, will be better understood byreference to the drawings, in which Figure 1 is a front elevation of myimproved pipe-bending machine. Fig. 2 is a side elevation of same. Fig.3 is a plan view of same. line 4 4 of Fig. 2. Fig. 5 is a sectionalelevation on line 5 5 of Fig. 1, and Fig. 6 is asectional view showingthe actionof' the cone and semicone in bending the pipe.

A is the main frame. B is a semicone fitted to the two side parts of themain frame at B B and held in place by a bolt 1). To prevent thesemicone B from revolving, it is provided with an arm B extendinglaterally and sleeved on the shaft C. The curved face of the semicone isprovided with a series of curved grooves B of different radii, andpreferably the roove of greatest radius is also of greatest iameter.

D D are two segmental gear-frames jour- Specification of Letters Patent.

Application filed October 14,1905. Serial No. 282.725.

Fig. 4 is a sectional elevation on Patented Aug. 14,1906.

' naled upon the side parts B of the semicone B, so as to be pivotedconcentric with it.

These frames D are connected by a shaft d,

upon which is journaled the cone F, having the circumferential grooves Fcorresponding to those on the semicone B, but in the inverted order, sothat the groove of smallest diameter forms a circle of the greatestradius and the groove of largest diameter forms a circle of the smallestradius.

The successive diameters .of the stepped portions of the cones B and Fare preferably made to closely fit, so that the pipe is completelyencircled by the two semicircular grooves of the respective cone parts Band F, as will be readily understood by reference to Figs. 4 and 6.

The segmental gear-frames D D mesh with the pinions E E on thepower-shaft C, which is journaled in the main frame and provided withhand-cranks C at each end, and when the said frames D D are rocked thecone- -frame F is carried around against the curved face of the semiconeframe orform B, as shown in-Fig. 6, so as to wrap or bend the pipe overthe curved surface of said semicone .B- as a form or mold.

To support the pipe during the bending operation, a guide-frame G isprovided. As

shown, it consists ofan oblique frame secured to the main frame andhaving a series of grooves or notches, preferably semicircular,corresponding with the grooves in the cone F, as clearly shown inFig. 1. The obliquity of the guide-frame conforms to the obliquity ofthe series of apertures formed between the semicone B and cone F in theinitial position for receiving apipe to be bent. This guide supports therear end of the pipe while the forward end is bei g bent upward, Figs. 5and6.

While I have shown the shaft C provided with hand-cranks C, it may beoperated or assisted by a belt running over the fast and loose pulleys TT. Any suitable means for applying power to the shaft C may be employedother than the means shown.

The operation will now be understood. A pipe S being placed between thecone parts B and F and supported by the guide G, as indicated in Fig. 5in dotted lines, the shaft C is rotated. The rotating pinions E E causethe rack-frames D D to rotate and swing the cone or semicone is amplysufficient in the commercial bending of pipes, for which this machine isdesigned. The grooves in the cone portions B F and guide G may be of anyshape desired to correspond to the particular cross-section of thetubular section to be bent; but ordinarily the cross-section would becircular.

What I claim as new, and desire to secure by Letters Patent, is

1 In a machine for bending pipe, the combination of a form having aconically-arranged series of grooves, a cone having correspondinggrooves arranged in the inverseorder, means for moving the conecircumferentially about the conical form consisting of two framesjournaled respectively at the ends of the form and power devices forrocking said frames.

2. In a machine for bending pipe, the combination of a main frame, aform having a conically-arranged series of grooves rigidly secured tothe main frame, a cone having corresponding grooves arranged in theinverse order, means for moving the cone circumferentially about theconical form journaled to the main frame at each end of the form, and aguide for supporting the pipe in alinement with the apertures betweenthe cone and form. a

3. In a machine for bending pipe, the combination of a form having aconicallyarranged series of grooves, a cone having corresponding groovesarranged in the inverse order, a rocking frame in which the cone is journaled and by Which it is moved about the form, a guide for the pipe,a rotary powershaft, and gearing for rocking the rocking frames from thepower-shaft.

.4. In a machine for bending pipe, the combination of a form having aconically-arranged series of grooves of different diameters, a conehaving corresponding grooves arranged in the inverse order, and meansfor moving the cone circumferentially about the conical form.

5. In a machine for bending pipe, the combination of a main frame, asemiconical form having a series of circumferential grooves of differentradii secured to the main frame, two segmental rack-frames journaledconcentric with the axis of curvature of the semiconical form andadapted to be rocked about it, a frame having a conical surfacejournaled in the segmental frames and provided with circumferentialgrooves in the inverse' order .of the grooves in the semiconical form, a

power-shaft, and gears on the power-shaft meshing with the racks of thesegmental rackframes.

6. In a machine for bending pipe, the combination of a main frame, asemiconical form having a series of circumferential grooves of differentradii secured to the main frame, two segmental rack -frames journaledconcentric with the aXis of curvature of the semiconical form andadapted to be rocked about it, a frame having a conical surfacejournaled in the segmental frames and provided with circumferentialgrooves in the inverse order of j the grooves in the semiconical form, aguide having a series of guide portions for the pipes arranged obliquelyin line with the grooves in the semiconical form, a power-shaft, andgears on the power-shaft meshing with the racks of the segmentalrack-frames.

7. In a bending-machine for pipes and rods of circular cross-section, amain frame combined With a curved form fixed to the main frame andhaving a series of conically-arranged stepped portions having thecylindrical surfaces provided with semicircular grooves of differentdiameters, a cone also having its surface formed by a series of steppedportions inversely arranged to the stepped portions of the form andhaving the cylindrical parts of said stepped portions provided withsemicircular grooves, means journaled to the main frame for moving thecone about the form, and guides for the pipes or rods in alinement withthe grooves in the form also secured to the main frame.

In testimony of which invention I hereunto set my hand.

. GEORGE H. REYNOLDS.

Witnesses:

R. M. HUNTER, R. M. KELLY.

